1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
|
/*
* Check printing of character/block device numbers in -yy mode.
*
* Copyright (c) 2018-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <stdio.h>
#include <unistd.h>
#include "scno.h"
#include <linux/fcntl.h>
#include <sys/sysmacros.h>
#ifndef PRINT_PATH
# define PRINT_PATH 1
#endif
#ifndef PRINT_DEVNUM
# if PRINT_PATH
# define PRINT_DEVNUM 1
# else
# define PRINT_DEVNUM 0
# endif
#endif
#ifndef PRINT_AT_FDCWD_PATH
# define PRINT_AT_FDCWD_PATH PRINT_DEVNUM
#endif
#if PRINT_DEVNUM
# define DEV_FMT "<%s<%s %u:%u>>"
#elif PRINT_PATH
# define DEV_FMT "<%s>"
#else
# define DEV_FMT ""
#endif
#if defined __NR_openat && defined O_PATH
int
main(void)
{
skip_if_unavailable("/proc/self/fd/");
# if PRINT_AT_FDCWD_PATH
char *cwd = get_fd_path(get_dir_fd("."));
# endif
static const struct {
const char *path;
unsigned int major;
unsigned int minor;
bool blk;
bool optional;
} checks[] = {
{ "/dev/zero", 1, 5, false, false },
{ "/dev/full", 1, 7, false, false },
{ "/dev/sda", 8, 0, true, true },
};
for (unsigned int i = 0; i < ARRAY_SIZE(checks); i++) {
/*
* We can't have nice things here and call openat() directly as
* some libcs (yes, musl, I'm looking at you now) are too
* frivolous in passing flags to the kernel.
*/
long fd = syscall(__NR_openat, AT_FDCWD, checks[i].path,
O_RDONLY|O_PATH);
printf("openat(AT_FDCWD"
# if PRINT_AT_FDCWD_PATH
"<%s>"
# endif
", \"%s\", O_RDONLY|O_PATH) = %s",
# if PRINT_AT_FDCWD_PATH
cwd,
# endif
checks[i].path, sprintrc(fd));
# if PRINT_PATH
if (fd >= 0)
printf(DEV_FMT,
checks[i].path
# if PRINT_DEVNUM
, checks[i].blk ? "block" : "char",
checks[i].major, checks[i].minor
# endif
);
# endif
puts("");
if (fd < 0) {
if (checks[i].optional)
continue;
else
perror_msg_and_fail("openat(\"%s\")",
checks[i].path);
}
int rc = fsync(fd);
printf("fsync(%ld" DEV_FMT ") = %s\n",
fd,
# if PRINT_PATH
checks[i].path,
# if PRINT_DEVNUM
checks[i].blk ? "block" : "char",
checks[i].major, checks[i].minor,
# endif
# endif
sprintrc(rc));
close(fd);
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_openat && O_PATH")
#endif
|